Continuity mistake: Travis shoots Harry in the leg, and Harry is slumped against the wall next to the doorway. When Payne sets off the bomb, Harry is now no longer near the door, and is halfway down the corridor. Not enough time had passed between shots for this to have occurred. (00:22:20)
Factual error: When the terrorist's first target, the elevator, first has its cables blown, it goes into free-fall for about 7 floors before the brakes kick in. That is about a 100 foot free fall, and not one person even falls down afterward. Are we to believe that around 5 seconds of negative G does not even result in a single person ending up on their rear? (00:05:00)
Revealing mistake: In the scene where Payne is waiting for the money to be dropped into the bin, he looks through the blinds out onto the street. When he lifts up the blind with his 'bad' hand, you can see his fingers and thumb taped up out of the way.
Continuity mistake: When the subway carriage bursts out into the street, Annie's handcuffs slide off the broken pole and in slow motion you can see the pole is shorter than all others. Besides, all the other poles in the carriage are intact. (01:49:15)
Other mistake: Just after the police close the roads in front of the news crews and the black police chopper lands in the road. There is a scene where the bus passes under a flyover with a police escort but the police car in front of the bus nearly stops, making the bus brake hard and nearly stop, bringing it well below 50 mph.
Revealing mistake: During the rescue of the elevator passengers at the start of the movie, when coaxing the last woman out, there is a shot of the interior of the elevator where you can see the ground through the hole in the elevator floor, even though the elevator is still meant to be on the 22nd floor. (00:16:47)
Factual error: Near the end of the movie, the villain shoots the operator of the subway car. In all rail transportation situations I am aware of, an operator falling from his seat would immediately cause the train to slow to a controlled stop. It's called the "dead man's switch." Obviously does not happen in this movie.
Factual error: According to the TV announcer, the bus went from the Santa Monica Freeway to Western Avenue to the 105 freeway. Two problems would have occurred. First, the Western Avenue exit from the SM freeway is way too narrow to safely make a turn at such high speed. Second, there is no onramp from Western Avenue to the 105 in any direction.
Continuity mistake: When Annie drives onto the shoulder, after Jack has come out from investigating the bomb underneath, the bus crashes into a car on a tow truck. In the first shot the tow truck is well inside the white line on the road and it looks like it's half on the grass as well. In the following shot when the bus hits the car, the tow truck has moved to its left and is now on the white line on the road. (00:44:35)
Factual error: When Payne blows the safety catch on the elevator it shows a shot of the floor level indicator going down from 29 to 25 in about 3 seconds. The camera cuts to inside for 5 seconds then the cable stopping the lift. This has taken approximately 8-10 seconds in total, but they are only on the 22 floor now. By the rate of which they were falling they should be on at least the 13th floor. Not taking into account that it would be accelerating as it goes down. (00:13:45)